Arbor and attachment for holding articles to be polished and finished



(No Model.)

C. H. BARTLETT.

ARBOR AND ATTAGHMBNT POR HOLDING ARTICLES T0 BE POLISHED AND FINISHED.

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UNITED STATES Erica.

'PATENT CHARLES II. BARTLETT, OF NEXV PORTLAND, MAINE.

ARBOH AND ATTACHMENT FOR HOLDING ARTICLES TD BE POLISHED AND FINISHED.

SPECIFICATION forming part of Letters Patent No. 587,170, dated July 27, 1897'.

Application led February 2l, 1896. Serial No. 580,284. (No model.)

To all whom it may con/cern.- Be it known that I, CHARLES H. BARTLETT, of New Portland, in the county of Somerset and State of Maine, have invented a new and useful Improvement in Arbors and Attachments for Holding Vooden Articles to'be Polished and Finished, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claim.

In the accompanying drawings, Figurel is a plan of my improved finishing and polishing devices. Fig. 2 is a sectional side elevation of the same. Fig. 3 is a like section of the expansible arbor and showing a turned wooden article secured thereon by the expansion ofthe arbor. Fig. 4t is a side elevation of Fig. l, reduced, showing the spindle as mounted upon a work-bench and the swinging treadle by which the rotating clutch or slide is moved horizontally on the spindle to expand or` compress the saine. Fig. 5 is an end elevation of the saine. Fig. 6 is a longitudinal section and end view of an expansible sleeve employed on the spindle to suit work of various diameters and to avoid making spindles of various diameters.

An arbor or spindle Ais mountedinstaudards B (only one of which is shown) upon a work-bench C. A pulleyD is secured to the arbor and is driven by a belt connected with pulleys on a counter-shaft in the usual and I-I, fitted on the arbor so as to rotate therewith and slidelongitudinally thereon. The pin also passes through a taper expandingrod I, which is moved by action of the clutch H inward and outward in the hollow spindle, causing the spindle to expand when the rod is moved inward and leaving it free to return by its elastic force to its normal position or condition when the rod is moved outward.

The clutch H has a circumferential groove H therein. A bracket J is bolted to the bench, Fig. 5, and from this bracket is suspended a swing treadle-lever K, pivoted to the bracket at L. The upper part K of lever K is fitted to enterand operate in groove H of the clutch H. The lower end of lever K is bifurcated and has a cross-bar K2 attached thereto, upon which the operator places his foot to swing the lever in'and out to actuate the clutch H. In Figs. l, 2, and 5 the expanding-rod is shown as thrown forward or outward and not operating to expand the spindle, this position being secured by a movement inward, by the foot of the operator, of the lower end of lever K,which,by its connection with the groove H', causes the clutch H to move outward or toward the operator, and, through the connecting-pin G, also moves the expanding-rod Iin the same direction, thusrelieving the spindle and allowing it to contract to its normal size, ready to receive any article to be placed thereon. A sliding collar M, having a recessed front face, as shown, is employed on the spindle for a purpose which will be explained.

In Fig. 3 the practical operation of the spindle is illustrated. A fancy box N is placed upon the spindle and the expandingrod forced inward by swinging the treadle outward, thus causing the interior surface of the spindle to impinge the exterior surface 4of the. chamber of the box and thereby to hold the box firmly while the finishing operations are performed thereon, and without the liability of splitting the box, whichis so common and wasteful of labor and material in the old way of forcing the article by hand onto an inelastic spindle or an elastic one previously expanded.

In the case illustrated the outward thrust of the expanding-rod, by the means and in the manner described, releases the elastic sides of the spindle and their reaction leaves the box free to be removed without danger of cracking or breaking the fragile shell or wall thereof. The recessed collar M, before referred to, serves in cases like that of the box illustrated in Fig. 3 to shield the tenon of the box, as shown, from becoming smeared with the liquid varnish or polish applied to the exterior surface of the body of the box in the process of nishing, thus keeping the tenon IOO free from obstructions to the cover when made, as usual, to'nicely lit thereon.

Vide differences in the diameters of articles to be held and operated upon in the manner and for the purposes described would necessitate the employment of expansible arbors of various diameters; but I avoid a multiplication of such arbors by the employment of an expansible sleeve like that shown in Fig. 7, which will be much less expensive. This sleeve S maybe fitted at its ends to the diameter of the arbor A and have a corresponding slit E' from its outer end inward and at its inner end may be secured to the spindle by a set-screw T or in any other convenient and suitable manner. A multiplication of such expansible sleeves will be comparatively cheap and their employment in the manner shown and described will be convenient and eilective. The sleeve may be composed ofa hub a, bored to slide onto the spindle, and a divided elastic bodyb,which may be attached, as at c, and at the opposite end to a divided ring d, as at c', the openin g through the ring being also itted to the expansihle spindle d.

By this construction sleeves of various dialneters may be uniformly bored through theirl ends to fit a single spindle and havea uniform thickness of elastic shell or body l), Whatever the diameter of the sleeves may be, the variations in their diameters being mainly dueto changes in the diameters of their end pieces, hub a, and ring d. "When the sleeve is properly secured in place on the spindle A' and in place of shield M, it will expand therewith, and thus hold work of larger internal diameter the same as the spindle alone will hold Work of smaller diameter, as illustrated in Fig. 3.

I claim- The combination of an ex pansible arbor A', A

and means for expanding and rotating the same, with an expansible sleeve S, mounted upon the arbor and arranged to he expanded by and with the arbor, as and for the p urposes specified.

CHAR-LES Il. BARTLET'I `Witnessesz WARREN B. CLARK, CHARLES Il. CLARK. 

